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Liquid crystal composition and liquid-crystal display device thereof

A technology for liquid crystal compositions and compounds, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of insufficient dielectric anisotropy of compounds, little help, and insufficient product response.

Active Publication Date: 2016-05-18
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the dielectric anisotropy and optical anisotropy of this type of compound are not large enough, and it is not helpful to mix into a composition with large Δn and Δε, which is not conducive to being used in products with small box thickness, which directly leads to the product not responding fast enough

Method used

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  • Liquid crystal composition and liquid-crystal display device thereof
  • Liquid crystal composition and liquid-crystal display device thereof
  • Liquid crystal composition and liquid-crystal display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0202] The liquid crystal composition of Example 1 was formulated according to the compounds and weight percentages listed in Table 4, and it was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0203] Table 4 liquid crystal composition formula and test performance thereof

[0204]

Embodiment 2

[0206]The liquid crystal composition of Example 2 was prepared by each compound listed in Table 5 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0207] Table 5 liquid crystal composition formula and test performance thereof

[0208]

Embodiment 3

[0210] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 6 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0211] Table 6 liquid crystal composition formula and test performance thereof

[0212]

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Abstract

The invention relates to a liquid crystal composition and its liquid-crystal display device. The liquid crystal composition comprises at least one compound as shown in the general formula I-1 and / or I-2; at least one compound as shown in the general formula II; at least one compound as shown in the general formula III; at least one compound as shown in the general formula IV; and at least one compound as shown in the general formula V. The liquid crystal composition has characteristics of wide nematic-phase temperature range, high dielectric anisotropy, proper optical anisotropy, high cryogenic storage stability, low rotary viscosity and the like. The liquid crystal composition is suitable for a liquid-crystal display device. By the use of the liquid crystal composition, a liquid-crystal display element has high dielectric anisotropy and high clearing point while fast response is guaranteed, can operate at low temperature and has good reliability and low threshold voltage. The liquid crystal composition can be used in TFT or IPS liquid-crystal display elements driven at medium-and-low voltage.

Description

technical field [0001] The invention relates to a liquid crystal composition and a liquid crystal display device thereof, in particular to a liquid crystal composition having relatively large dielectric anisotropy, relatively high clearing point, low rotational viscosity and appropriate optical anisotropy and comprising said Liquid crystal display device of liquid crystal composition. Background technique [0002] For liquid crystal display elements, according to the display mode of liquid crystal, it is divided into PC (phase change, phase change), TN (twistnematic, twisted nematic), STN (supertwisted nematic, super twisted nematic), ECB (electrically controlled birefringence, electrically controlled birefringence) , OCB (optically compensated bend), IPS (in-plane switching, coplanar transformation), VA (vertical alignment, vertical alignment) and other types. According to the driving mode of the component, it is divided into PM (passive matrix, passive matrix) type and AM...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
Inventor 贺笛韩文明丁文全徐海彬李鹏飞戴慧娟姚利芳刘云云马文阳王盼盼马定福施红萍张鹤鸣
Owner JIANGSU HECHENG DISPLAY TECHCO